Preheat the oven to 425°. Fit your pie crust into a pie pan, fill with a layer of parchment paper, then pie weights, dried beans, or flour to weight it down while it blind bakes. You only need a shallow layer. Bake for 10 minutes until lightly browned. Lower the oven to 350°.
In a microwave safe bowl add the butter and chocolate. Microwave in 30 second intervals until the chocolate is fully melted. Set Aside.
In a large mixing bowl, add both eggs, sugar, and the vanilla extract. Whisk together for 2-3 minutes until the mixture is light, fluffy, and pale yellow.
Add the chocolate mixture to the eggs and sugar, and mix together until almost fully combined.
Sift the flour, baking soda, and salt into the chocolate mixture. Fold together with a spatula until fully combined. Add additional chocolate chips to your mixture if desired.
Bake at 350° for 25-30 minutes, until brownie is fully cooked and a toothpick comes out clean. Serve with chocolate, caramel sauce, whipped cream, and or ice cream!